Pneumatic pump.



NQ'- 894,586. PATENTED JULY 28, 1908.

'y f A. BREST.

PNEUMATIG PUMP.

APPLICATION FILED 00T.19, 1907.

@vih/lemas l atmnus ALBERT BREST, oF 'NEW CASTLE, PENNSYLVANIA.

PNEUMATIC PUMP.

Specification of Letters Patent. Application led October 19, 1907. Serial No. 398,186.

Patented J' uly 28, 1908.

To all whom it may concern:

Be it known that I, ALBERT BREST, a citizen ofthe United States of America, residing at New Castle, in the county of Lawrence and 5 State of Pennsvlvania, have invented certain new and usefu Improvements in Pneumatic Pumps, of which the following is a specification, reference being had .therein to the accom anying drawing.- y

T is invention relates to pneumatic pumps for inflating rubber tires, and its object is, to

provide means for inflating the tires of anl automobile while the machine is in motion.

The invention comprises a clutch mounted upon the wheel axle, a cylinder and piston, and mechanism operated thereby for throwing the clutch members'into engagement, and automatic mechanism for disconnecting the clutch members after the tire has been inilated.

The construction of the improvement will be fully described hereinafter, in connection with the accompan ing drawing which forms a part of this speci cation, and its novel features will be defined in the appended claims. In the drawing: Figure 1 is a side elevation of a portion of an automobile wheel with my improvement applied thereto, Fig. 2 is a view partly in vertical section, and partly in elevation of the same, Fig. 3 is a sectional view of the clutch mechanism employed, and, Fig. 4 is an elevation of the Supporting frame or yokeof the clutch mechanlsm. The reference numeral 1 designates the axle spindle upon which the wheel hub 2 is mounted; and the numeral 3 designates the wheel rim connected to the'hub by spokes'4, and having a pneumatic tire 5 applied thereto.

Secured upon one end of the hub 2 isa yoke or frame consisting of two semi-circular straps 6, provided with projecting arms 7 and 8 formed with circular bearings 9 and 10 and riveted as shown. Upon the central portion of the hub is'mounted a oke or frame 11 formed at its u(pper end wit a bearing 12 andv arranged within the upperarm 16 of the pipe the pum 15, provided with a piston rod 18 supported in the bearing 9 and having a headl 19 adapted to bear against the clutch member 20, which is loosely supported upon the spindle 1, and is provided with a spring housing 21, containing a coil spring 21a.

A spring 17 is arranged on the rod 18 Within the portion 16 of the ipe 15, between said piston 17 and the close end of the pipe.

The other clutch member 22 is keyed to the spindle 1 and the confronting faces of both clutch members are formed with teeth adapted lto interlock when the members are in engagement.

Mounted in the bearing 10 is a shaft 23 upon the outer end of which is secured a mion 24 adapted to mesh with a gear 25 ormin a part of the clutch member 20. Upon t e inner end of the shaft 23 is a crankdisk 26 connected to one end of a crank 27 the opposite end of which is connected to a piston rod 28 within the cylinder 13 and carr Iing a piston 29.

T e operation of the mechanism constructed as above described is as follows: As long as the tire 5 is inflated, air passing through the tube 14, and ipes 15 and 16 will force the head 19 of t e against the gear 25 of the clutc member 20 thus holding the two clutch members out of engagement, and also holding the ear 25 out of mesh with the pinion 24. soon however as the air pressure is reduced the piston rod 18 moves away from the gear 25, the coil spring 21a forces the clutch member 20 into engagement with the member 22,

and at the same time causes the gear 25 to engage the pinion 24. Thisbrings the piston 29 into action throu h the intermediacy of the crank-disk 26, ancrank 27 to pump air intothe tire. When the air ressure 1s sufficiently increased to overcome t e tension of the spring 17', the piston 17 will be moved forcing rod 18 outwardly so as to cause the head 19 to engage the gear -25 so. as to sepaiston rod 18 rate the clutch members and stop the pump- E ing ..ction of the piston 29.

will be apparent that the operation ofl is automatic and that the wheel tire 1s i ated while in motion.

I would have it understood that the invenfollowing claims.-

. ends thereof andvhaving its outer end extended angularly and received in the bearing of said yoke, a frame iixed on the wheel hub adjacent one end thereof and provided near each end with a bearing, a shaft mounted in one of said bearings and carrying a crank, a piston within said pum cylinder to which said crank is connecte a piston arranged in the angularly extended portion of said pipe and having its rod extended through the other bearinflr of said frame, a clutch member rigidly xed v on the axle of said wheel, a second clutch member movably mounted on said axle and normally held out of engagement with the rigid clutch member of said piston rod, and a pinion on said shaft to engage with the movable clutch member when the latter is in engagement with the rigid clutch member whereby motion is imparted to the piston in said pump cylinder.

2. A pump attachment for pneumatic tires com rising in combination with a wheel hub, a W eel rim, and a tire carried by said rim, a pump cylinder connected at one end i to the wheel rim, a yoke on the wheel hub to which the other end of the pump cylinder is connected, said yoke provided with a bearing, a pipe communicating at one end with the pump cylinder and having its other end extending parallel with the wheel hub and received in the bearin of said yoke, a frame mounted on the whe hub and having a bearing adjacent each end, a piston mounted in the angularly extending portion of said pipe having its piston rod received in one of the bearings of said frame, a spring arranged in the pipe between the piston and the closed end of the pipe, a shaft journaled in the other bearing of said frame, a piston in the pump cylinder, connections between said piston and said shaft, a pinion carried by said shaft, and a ixcd clutch member and a movable clutch momber normally held out of engagement with the pinion on said shaft by the piston rod extending from the angularly extending portion ol' said pi e.

In testimony w ereof I aiix my signature in the presence of two Witnesses.

ALBERT BREST. Witnesses:

THOMAS G. FISHER, JAMES G. FULKERsoN. 

